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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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CS5920 датащи(PDF) 143 Page - Applied Micro Circuits Corporation |
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CS5920 датащи(HTML) 143 Page - Applied Micro Circuits Corporation |
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143 / 160 page  S5920 – PCI Product Revision 1.01 – November 28, 2005 AMCC Confidential and Proprietary DS1596 143 Data Book (disconnect, but with no data transfer), the read data is held in the FIFO until the master comes back for it. In this case, the Retry Flush Enb has no effect. The PCI 2.1 Specification states that the master must come back if it receives a retry. Write FIFO Mode indicates what to do in the event that a full FIFO is detected during a PCI write transfer. If low, the S5920 will perform an immediate disconnect, thus freeing up the PCI bus for other transfers. The ini- tiator will have to come back to complete the data transfer, after which time the FIFO should no longer be full. If Write FIFO Mode is high, the S5920 will deas- sert TRDY#, and allow for either another FIFO location to become available (as the Add-On has read a DWORD), or wait for the Target Latency to expire (8 clocks from previous data phase), thus initiating a dis- connect. This will allow for the Add-on device to “catch-up” without losing the burst. |
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